PennController().noHeader() (since beta 0.3) or newTrial().noHeader() since 1.7
Will not run the header sequence at the beginning of the trial. Note that this also concerns default commands defined in the header: those will not be run in trials where you use noHeader.
Example:
[js highlight=”26″ try=”data”]Header(
defaultButton
.print()
.wait()
,
newText(“please”, “Please give a score”)
.print()
)
newTrial( “twoClicks” ,
newScale(“score”, 5)
.print()
,
newButton(“validate”, “Validate”)
.wait( getScale(“score”).test.selected() )
)
newTrial( “oneClick” ,
newScale(“score”, 5)
.print()
,
newButton(“validate”, “Validate”)
.print()
.wait( getScale(“score”).test.selected() )
)
.noHeader()
[/js]
The first trial (labeled twoClicks) will show a text at the top of the page, then a radio-button scale and a button. Because the header already contains a wait command, two clicks will be necessary to validate the button (the second one having to happen after a radio-button is selected). On the contrary, the second trial (labeled oneClick) which uses noHeader, will show no text at the top of the page and will only require one click on the button to validate it (assuming a radio-button is selected), because it will only evaluate and execute one wait command.